Two-dimensional waveguide slot array antenna having decoupling structure and design method thereof

A slot array antenna, two-dimensional wave technology, applied in slot antennas, antennas, antenna coupling and other directions, can solve the problems of high-performance radar and high-speed wireless communication services, etc., to weaken the coupling effect, improve the matching bandwidth, and facilitate processing. Effect

CN107910642AInactive Publication Date: 2018-04-13XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a two-dimensional waveguide slot array antenna having a decoupling structure and a design method thereof and relates to a waveguide slot antenna. The antenna sequentially comprises a T-shaped power splitter main waveguide, a feed waveguide, coupling slots, a radiation waveguide, radiation slots and an open air cavity from down to up. The antenna has the decoupling structure, the open air cavity is added outside the radiation slot, the mutual coupling effect between the radiation slots is suppressed by optimizing the three-dimensional size of the air cavity, and antennabandwidth constraints of mutual coupling in large-scale arrays are effectively ameliorated. According to antenna bandwidth design requirements, the proper antenna feed network is designed, through antenna sub-arrays, the integral antenna is simplified into multiple sub-arrays, so antenna bandwidth is ameliorated, and design difficulty is reduced; the quantity of radiation slots and coupling slotsin series connection in each sub-array is small, a resonant array can be employed for design, namely a standing wave array form, and matching bandwidth and radiation bandwidth of the antenna sub-arrays are greatly improved through specifically employing the overloaded technology.
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Description

technical field

[0001] The invention relates to a waveguide slot antenna, in particular to a two-dimensional waveguide slot array antenna with a decoupling structure and a broadband design method of a resonant two-dimensional array based on overload technology. Background technique

[0002] The waveguide slot array antenna has the advantages of high efficiency, compact structure, and high power capacity. It is easy to achieve high-frequency band, high gain, and low sidelobe performance. It is widely used in aerospace and radar communication systems. It is a kind of aperture antenna formed by opening slender cracks on the waveguide wall according to certain rules, cutting off the current path on the waveguide wall, exciting the gap, and radiating electromagnetic waves transmitted in the waveguide to free space through the gap.

[0003] Common slots include inclined slots on the narrow side of the waveguide, transverse slots and longitudinal slots on the wide side of the waveg...

Examples

Embodiment Construction

[0035] Below in conjunction with accompanying drawing, the present invention will be further described through embodiment.

[0036] This embodiment is a two-dimensional waveguide slot array antenna with a decoupling structure, which uses an 8×8 array element structure. The array antenna works in the X-band and uses a center feed with a center frequency of 9.5 GHz.

[0037] see Figure 1~3, the 8×8 array antenna consists of the lower feed network (T-type power divider main waveguide 1, feed waveguide 2) and the upper radiation waveguide 4, air cavity 6, between the feed waveguide 2 and the radiation waveguide 4 The connection is through the coupling slot 3 , and the radiation waveguide 4 and the air cavity 6 are connected through the radiation slot 5 . The incident electromagnetic wave passes through the main waveguide 1, the feeding waveguide 2, the coupling slot 3, the radiation waveguide 4, the radiation slot 5 and the air cavity 6 of the T-shaped power divider in sequence ...